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An all-fibre PM MOPA pumped high-power OPO at 3.82microns based on large aperture PPMgLN
Dejiao Lin1, Shaif-ul Alam1, Yonghang Shen2, Tao Chen2 and David J.Richardson1
1. Optoelectronic Research Centre, University of Southampton, UK
2. State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China
Abstract
We report a large aperture PPMgLN based OPO generating 21W of average output power at a slope efficiency of 45%, pumped by the output from a polarization maintaining Ytterbium doped fiber MOPA operating at 1060nm producing 58W of average output power and 20ns pulses at a repetition rate of 100kHz. A maximum of 5.5W of optical power was recorded at the idler wavelength of 3.82μm without thermal roll-off. We have experimentally verified that the pulse rise/fall time plays a significant role in the OPO conversion efficiency and that further enhancement in the OPO conversion efficiency will be possible using sub-nanosecond rise and fall times.
SPIE Photonics West 2012 San Francisco 21-26 Jan (2012)
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Copyright University of Southampton 2006